The Doctor's Daughter

[2] Set on the planet Messaline, the episode features Georgia Moffett as Jenny, the cloned daughter of the series' protagonist, the alien time traveller the Tenth Doctor.

The plot of the episode involves two factions of clones descended from a group of human and alien Hath pioneers, each of whom are seeking to wipe out the other side with a lost artefact called the Source, while the Doctor also comes to accept Jenny as his real daughter.

The Doctor confides privately to Donna that he is resistant to Jenny travelling with them because she reminds him too much of everyone who was killed in the Time War.

[3] Jenny's death was originally to take place in what Davies called "a Generic Spaceship Room", but producer Phil Collinson suggested filming the scene at Plantasia botanical garden in Swansea.

[3] Georgia Moffett, who plays Jenny, is the real-life daughter of Fifth Doctor actor Peter Davison and The Hitchhiker's Guide to the Galaxy actress Sandra Dickinson.

[3] Moffett previously appeared alongside her father in the Big Finish audio story Red Dawn and drama series Fear, Stress & Anger.

Unofficial figures indicated that "The Doctor's Daughter" was watched by 6.6 million viewers, giving it a 38.4% share of the total television audience.

He also described the episode as "quite redolent of Tom Baker-era Who, with plenty of dark and cheap corridors to run down and two under-manned warring factions for the Doctor to bring peace to".

Although "reasonably diverting", Berriman argues that budgetary constraints make "the story feel so enclosed" and that the episode's plot, likened to "old-school Trek", seems too similar to that of the Sontaran two-parter immediately prior to this adventure because both involve "militarism" and "cloning".

Mzimba asserts that the episode's "biggest problem" is that it tries "to cram an enormous amount into 45 minutes" with most of the "interesting" and new ideas not getting "the attention they deserve" resulting in the audience not caring about either the human fighters or the Hath and thereby limiting a "sense of danger or menace".

[12] Mzimba observes that, since her return in "The Sontaran Stratagem", Martha shares little onscreen time with the Doctor therefore reducing the emotional impact of her departure in this episode.

Anderson asserts that "Donna's role as the Doctor's conscience is beginning to take shape" describing this as "refreshing" in a companion and noting that "Tate has toned down the grating voice a tad".